#!/usr/bin/env bash
# Backup script for sensitive dotfiles
# This handles files that shouldn't be stored directly in git

set -euo pipefail

DOTFILES_DIR="$HOME/dotfiles"
BACKUP_DIR="$DOTFILES_DIR/backups"
TIMESTAMP=$(date +%Y%m%d_%H%M%S)

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

echo -e "${GREEN}Starting sensitive files backup...${NC}"

# Create backup directory
mkdir -p "$BACKUP_DIR"

# Function to backup a file/directory with encryption
backup_encrypted() {
    local source="$1"
    local name="$2"
    
    if [ -e "$source" ]; then
        echo -e "${YELLOW}Backing up $name...${NC}"
        tar -czf - "$source" | gpg --symmetric --cipher-algo AES256 -o "$BACKUP_DIR/${name}_${TIMESTAMP}.tar.gz.gpg"
        echo -e "${GREEN}✓ $name backed up and encrypted${NC}"
    else
        echo -e "${RED}✗ $source not found${NC}"
    fi
}

# Backup SSH keys and config (encrypted)
backup_encrypted "$HOME/.ssh" "ssh"

# Backup shell history
cp "$HOME/.zsh_history" "$BACKUP_DIR/zsh_history_${TIMESTAMP}"
echo -e "${GREEN}✓ Shell history backed up${NC}"

# Create a sanitized SSH config for git
if [ -f "$HOME/.ssh/config" ]; then
    echo -e "${YELLOW}Creating sanitized SSH config...${NC}"
    # Remove sensitive host details but keep structure
    sed -E 's/(HostName|User|IdentityFile) .*/\1 <REDACTED>/' "$HOME/.ssh/config" > "$DOTFILES_DIR/ssh/config.example"
    echo -e "${GREEN}✓ SSH config template created${NC}"
fi

# List what needs manual backup
echo -e "\n${YELLOW}Remember to manually backup:${NC}"
echo "- Any private keys stored outside ~/.ssh"
echo "- Any credentials in ~/.aws, ~/.gcloud, etc."
echo "- Application-specific secrets"

echo -e "\n${GREEN}Backup complete!${NC}"
echo -e "Encrypted backups stored in: $BACKUP_DIR"
echo -e "To decrypt: gpg -d file.tar.gz.gpg | tar -xzf -"